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Difference between Siemens CCa & 7308

Any significant differences between Siemens CCa and 7308 tubes of the same era? I know the CCa is highly regarded, hard to find and expensive. Seems the Siemens 7308 is a bit easier to find and slightly less costly. Does the 7308 give up much in performance? Thanks!
rja
dsremer
210 posts
 
I have them both and feel that the 7308 tube offers most of what a CCA has at less money, but as always, tubes are very system dependent.
Post removed 
audiofeil
4,011 posts
 
I'd opine that in most systems a good 6922 or 7308 will suffice. To fully appreciate the nuances of Cca, the other system components must be a very high level.

I use a pair of Cca in what many users would call a reference phono stage. Yes, and as Grant says, the presentation is more refined and the imaging is better but there is a price to pay for this.

I think most users would be totally satisfied with a high quality Amperex 6922 or Siemens 7308.

YMMV
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